Kim Kardashian West attending the 2016 MTV Video Music Awards at Madison Square Garden in New York. Kardashian was held at gunpoint in a Paris hotel on October 3, 2016 but was unharmedCredit:
ANGELA WEISS/AFP

A passer-by reportedly spotted the diamond cross pendant made from platinum a day after the American reality TV star was robbed at gunpoint in her luxury hotel in central Paris, and handed it over to police.

The piece of jewellery is believed to be worth £27,000. According to TMZ, the pendant was made by renowned jewellers Jacob and Co.

One of the apartments in the luxury block in Paris where Kim Kardashian was robbed at gun point

With precious few leads since last Monday's daring attack in a discreet town mansion near the Elysée Palace, police are pinning their hopes on the discovery of the gem.

According to BFMTV, forensic experts have singled out "several DNA" signatures on the pendant that could help identify the thieves.

French investigators could ask the FBI to question Ms Kardashian West on their behalf in light of the latest development in the case, the rolling news channel reported.

The Paris prosecutor has described the five robbers thought to have carried out the heist as in their forties or fifties, of European descent and speaking "French without an accent".

The development came as the 35-year-old reality TV star filed a £4.5 million insurance claim for the stolen items, including a £3.2 million engagement ring presented to her by rapper husband Kanye West. She is also reportedly to file for compensation due to trauma and lost earnings.

The star left France on a private plane hours of the crime in the early hours of Monday morning. She told police that she had a gun pointed to her head, and was tied up and gagged by two of the raiders, who posed as police officers, while the others waited outside.

They are thought to have all left on bicycles.

Ms Kardashian said she was able to "wriggle out" of hand ties, before screaming from a balcony, but neighbours have told police they heard nothing.

The only other witness was an unidentified French concierge who said he was threatened and asked: "Where's the rapper's wife?"

There was no sign of forced entry and it is unclear how the robbers managed to get into the hotel.

Last week, prosecutors said they had obtained no CCTV footage of the gang.